Blast and cupola furnace.



No. 657,03l. Patented Aug. 28, I900. A. REYNOLDS.

BLAST AND GUPULA FURNACE.

(Application filed Dec. 7, 1898.) (No Model.) 3 Sheets8heat l.

5 u! m T W r A A C W CLZJL M QWW mgz N0. 657,03I. Patented Aug. 28,I900.

REYNOLDS.

BLAST AND GUPOLA FURNACE.

(Application filed Dec. 7, 1898.)

(No Model.) 3 Sheets-Sheet 2.

A V V A V VI I No. 657,03l. Patented Aug. 28, I900. A. REYNOLDS.

BLAST AND CUPOLA FURNACE.

(Application filed Dec. '7, 1898.

(No Model.) 3 Sheets-Sheat 3.

Nrrnn STATES PATET Danica.

ALLEYNE REYNOLDS, OF SHEFFIELD, ENGLAND.

BLAST AND CUPOLA FURNACE.

SPECIFICATION forming part Of Letters Patent NO. 657,031, dated August28, 1900. Application filed D cember 7,1898. Serial No. 698,556- (Nomodel.

To aZZ whom it may concern.-

Be it known that I, ALLEYNE REYNOLDS, a citizen of England, residing atBolsover Hill, Sheffield,in the county of York,England, have inventedcertain new and useful Improvements in Blast and Cupola Furnaces, (forwhich I have applied for a patent in Great Britain, No. 22,182, datedOctober 21, 1898,) of which the following is a specification.

In blast and cupola furnaces as they are usually worked themetal-bearing materials are in direct contact with the solid fuel andthe smelted or melted products are thus rendered more or less impure.

My invention has for its object the treatment of ores and metals infurnaces of the blast or cupola type in such a manner as to avoid theobjectionable effects of their treatment in contact with solid fuel. Forthis purpose I blow through refractory twyers into the lower part of thefurnace just above the well combustible gas and air under pressure,these or either of them being heated. I shall describe arrangements forthis purpose which may be variously modified to suit variouscircumstances.

Referring to the accompanying drawings, Figure 1 is a vertical section,and Fig. 2 is a sectional plan, of a furnace worked with gas from twoproducers beside the cupola. Fig. 3 is a vertical section, and Fig. 4 asectional plan, of a furnace worked with gas from a single producer nearthe cupola. Fig. 5 is a vertical section of a furnace worked with gassupplied from a distance.

Referring first to Figs. 1 and 2, O is part of a cupola, W its well, andH its tapping-hole. P is one of a pair of gas-producers situated nearthe cupola, one on each side, and com municating with its well bydownwardly-inclined twyers T. A pipe A supplies compressed air to twobranches A and A each furnished with regulating-valves V andcheck-valves V. The lower branch A supplies air to the lower part of theproducer. The upper branch A extends through the upper part-0f theproducer and partly into the twyer. Thus hot gas as it is produced andair partly heated produce a flame directed downward into the cupola andoperate on its charge.

As shown in Figs. 3 and 4, a single producer Pis suppliedwith air at thebottom byabranch A from the compressed-air-supply pipe A, from whichother branches A A pass to the twyers T at each side of the cupola C,while pipes G from the producer lead gas to the twyers T. V V areregulating-valves, and V V are check-valves.

When the gas, which may be water-gas, is supplied from a distance, thearrangement shown in Fig. 5 may be adopted. In this case the air and gasare supplied under pressure to the receptacles A and G, respectively,from which pipes A A lead the air and G G lead the gas to the twyers T,these pipes being furnished with regulating-valves V and checkvalves V.The check-valves V serve in all the arrangements described to preventbackflow, by which explosive mixtures might be formed in the pipes orreceptacles.

The following are examples of the application of a cupola or such likefurnace worked as described without solid fuel coming in contact withthe charge: The furnace having a basic lining, such as dolomite lime ormagnesite,is heated,and then charged to some height above the twyerswith lumps of limestone. When the charge is well heated, pigiron, it maybe with scrap and iron ore, is charged into the furnace with excess oflime stone. As the molten metal descends it parts with phosphorus andother impurities and the purified iron is tapped from the well. When thefurnace is employed to smelt chromite, so as to obtain ferrochrome, thelining should be acid or neutral and water-gas is preferably employed.

Having thus described the nature of my invention and the best means Iknow for carrying the same into practical effect, I claim- In anapparatus for treating ores, the combination with a furnace of blast orcupola type formed with twyers sloping inwardly and downwardly to theinner wall of the furnace; with an apparatus for producing gas locatedone at each side of the furnace, and communicating with thefurnace-twyers by pipes, a compressed-air supply, a branched pipe forconducting such com pressed-air supply under pressure both to thegas-prod ucer and inclined twyers to commingle with the hot gases asthey enter the furnace; one of said pipes supplying air to the lowerpart of the gas-producer and the other of said pipes extending throughthe upper part of the gas-producer structed and arranged to operatesubstanand partially into the twyer, whereby the tially as and for thepurpose set forth. generated gas and the partly-heated air pro- Intestimony whereof I have hereunto set duce a flame which is directedinto the furmy hand in presence of two subseribin, wit- 5 naee; ofregulating-valves in said branched nesses.

pipes at each side of the main pipe, and check- 7 valves in each of saidbranched pipes for sup- ALLEX NE REYNOLDS plying the air wherebybackflow of gas, by \Vitnesses: which explosive mixtures might be formedin J NO. P. M. MILLARD, lo the pipes or receptacles, is prevented, allcon- FRED. O. HARRIS.

